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Recompute the hashes for a document or corpus

Source: R/rehash.R
rehash.Rd

Given a TextReuseTextDocument or a TextReuseCorpus, this function recomputes either the hashes or the minhashes with the function specified. This implies that you have retained the tokens with the keep_tokens = TRUE parameter.

Usage

rehash(x, func, type = c("hashes", "minhashes"))

Arguments

x

A TextReuseTextDocument or TextReuseCorpus.

func

A function to either hash the tokens or to generate the minhash signature. See hash_string, minhash_generator.

type

Recompute the hashes or minhashes?

Value

The modified TextReuseTextDocument or TextReuseCorpus.

Examples

dir <- system.file("extdata/legal", package = "textreuse")
minhash1 <- minhash_generator(seed = 1)
corpus <- TextReuseCorpus(dir = dir, minhash_func = minhash1, keep_tokens = TRUE)
head(minhashes(corpus[[1]]))
#> [1] -2123034802 -2135950804 -2141005830 -2143887934 -2140211929 -2141513215
minhash2 <- minhash_generator(seed = 2)
corpus <- rehash(corpus, minhash2, type = "minhashes")
head(minhashes(corpus[[2]]))
#> [1] -2139907006 -2113028606 -2143609422 -2087210065 -2050121581 -2049620020